Collapsible core



Filed June 21, 1925 2 Sheets-Sheet l wirf/5835s @Mx/?.

:WEA/m faim/mm l June 2 5, 1929. P. DE MATTIA 1,718,636

coLLAPsIBLE CORE Filed June' 21, 1923 2 Sheets-Sheet 2 IN1/Emmi? PEYZYQDZMQTTZA I. ma); 9

\j Arrofmfrs Patented June 25, 1929.

UNITED STATES PATENT OFFICE.

PETER DE MATTIA, OF PASSAIC, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS, T NATIONAL RUBBER MACHINERY COMPANY, 0F AKRON, OHIO, A CORPORATION 0F OHIO.

COLLAPSIBLE GORE.

The present invention relates to collapsible cores used in the manufacture of shoes or casings for pneumatic tires, and has for its object to produce a collapsible core in which the movable core sections are arranged to be successively moved into and out of a position of operative continuity, and to simultaneously impart to some of the movable sections amovement into and out of the plane of operative lo continuity, and to provide means whereby such movements are accomplished by the manipulation of a single actuating device.

A further object is to so connect the sections of the core that the movable sections, while at l5 all times connected to each other and to the fixed section, shall nevertheless have the desired freedom of movement essential to producing a maximum collapsing "of the core, and in the movement of the parts to place all of the core sections in a position of operative continuity, the sections at this time forming a continuous annular core.

To the above ends the present invention consists of a collapsible core comprising a plurality of articulated sections7 with means whereby said articulated sections are successively moved, a collapsible core in which the movable sections are moved spirally into and out of operative continuity and with relation to the 3o plane of operative continuity, and it further consists of the devices and combinations of devices which will be hereinafter described and claimed.

The present invention is illustrated in the a5 accompanying drawings, in which- Fig. 1 shows a front elevation w1th the -core sections in the position of operative continuity, and also in the plane of operative continuity.

Fig. 2 shows a sectional view taken on the line 2-2 in,Fig. 1, parts being shown in elevation, and also illustrating in dotted lines the axial movement of the actuating device.

Fig. 3 shows a fragmentary sectional view, partsbeing shown in elevation, and illustrating the connection between the operating device and the supporting spindle which produces the axial movement of the actuating device and the spiral movement of the articulated sections.

Fig. 4 shows a section taken on the line 4 4 in Fig. 3.

. Fig. is a front elevation, parts being shown 1n section, showing the core in operative continuity and in the plane of operative continulty.

Fig. 6 is a similar'view illustrating the position of the parts at the initial collapsing movement, with one of the movable sect-ions moved inward preliminary to' this movement of the other sections.

Fig. 7 illustrates the position of the parts when the movement of the movable sections has elevated the initial section and withdrawn the second section from the tire.

Fig. 8 shows a view similar to Fig. 7, when the second movable section has been moved to that extent which raises it out of the plane of the other sections, and has effected the withj(nl rawal of the third movable section from the Fig. 9 is a side elevation showing the parts in that position shown in Fig. 8.

Similar reference characters will be .ein-

ployed throughout the specification and drawings to designate corresponding parts.

The core comprises a plurality of segmental sections, 1, 2, 3 and 4, of such size and shape that when assembled as shown in Fig. 1, in alignment, they form a complete annulus, and when thus assembled the parts are all in the same plane and in a position of operative continuityand also in the plane of operative continuity. The device also comprises a chuck 5 which is connected to a plate 6 by means of the bolts 7 the plate 6 being adapted to be con-- nected in any suitable manner to a jack or support not shown. The chuck 5 is provided with :radial arms or brackets 8, to which the fixed section 1 is secured, as by means of the bolts il. This section 1 has no movement and of course always remains in the Same position, and it is the movement of the other sections with relation to the fixed section 1 which causes the core to be expanded or collapsed. v

The segmental section 2 is pivotally supported as at 10, to an ear 11 carried by the bracket arm 8, so that the section 2 has a movement about the pivot 1() towards and away from the axis or the center of the core, the .f

arrangement being such ythat it moves always in the plane of operative continuity when. moved with relation to the position of operative continuity.

Sil

tibi

; the: section-3.1 a; pifvotali movementabout' that. pivot 12e. toward'and away from.I the center'- or of'the.-core,l witlrrelation tothe: posi tion.ofoperativecontinuity, butit' also hasaa` b pivotalmovement about-thec pivot'. 1.4i` atri t amovement'toward and awayfrom'the. plane; of operative: continuity, `and* the combinationr or resultant pivotal actionpermits the section 3; to bemoved inavspiraldirection about the axis ofthe core.1 i

The se ent'al'sectionv4 is connected to the section 3 ja. swiveledarticulation:like that just descrgedgrcomprisingfapivotl, link 17,k pivot18 andistudl), sothat thesection4 like-l wise has a movementinandfoutiofftlieposi tion ofroperativeecontinuityiandwithV relation. to the plane 4of operative'continuityin aspiral direct1on,and becauseof thearticulated and pivotal connectionsof Athe sections 2, 3 and 4, the movement of section 4to collapse orl ex-l pand 'the core. will;v be. imparted successively to sections v3and2,.crit-mayl belsaid that the sections moversuccessively train.l

It isto-beanot'ed that the: section 4 isthe one to which` the initialmovementissimpam ed, and for`r this purpose itisf: provided near itsfreeend witha swiveled stud 20 to which is pivotal] fconnectedzat 21 a curved arm or link'22. is pivotally'conneetedat-i23to crank arms 24 carried at the lower end ofiatubular actuat i device,.f25,.wliicli` atiits outer endnisf. rovi ed withv a liandwheel 26' and; whic is move along acent y disposed post 27 su ported. atthe or. central portion off t e core by means ofthechuckf. he movement of thisactuatingvdevioe'about the post 27 will ofv course, through thezlink 22, cause a suc cessive movementofthemovable sections-intov and'v out of. the positionof.,` operative continu- A ity, and amovement oftheactuating'f'device.

axiall along the post impart to the move le sections 3`and,y 4 amovement with f relation to the plane of 'operativecontinuity. It will be notedrthatrt e-joint or. meeting facesof: the sections-.1 and4, indicatedby the numeralv28,..extend`s tangentially, and that the joint29-between the sections 1 and 2 also extendstangenti'ally butiat. an: angle tothe joint28', whereas the joints 30 and v31 betweenv the1 sect1ons2' .and3and1 3" and 4 respectively, extend radially.' This rovides for av freedom ofi' movement oft et' parts, as will be hereinafter-described.l

' nndnwivnledif miennes?. connectionsV ofthe movable, sections are located` upon on withinthe' inner periphery 'of-the sectionswhich'also msuresa freedom. offpivotal: action and a:

angles to thepivot 12, so thatthe'section 3 as.4

eother endof the armor 1.11am: l

maximum collapsi movement of the movable sections with re ation to the position of operative continuity. In the collapsing movement it is intended that thc section 4 shall be withdrawn from the tire by a pivotal movement inthe plane of operative continuity only, so as not to distort the rubber y themovement of withdrawal, and for this purpose the tubular sleeve or actuating dcvice 25 is provided with a stud 32 arranged to engage an annular groove 33 in the post 27. Engagement of the stud 32 with the annular groove 33 insures that the tubular sleeve 25 shall have a turning movement about the post suiicient to withdraw the section 4 from the tire before the spiral movement This'spiral movement is eected by means of a spiral. groove 34 in the post 27 arranged to be en aged b the stud 32 and connecting withv 51e annui'argroove, the a ent being such that when the actuating device has been'revolved to that extent perrmtted by the annular groove to withdraw the section 4 from the tire, the tubular sleeve 25 will then, because of the engagement of the stud 32 with the spiral groove 34, be moved outwardl along the postv27, whereby the section 4 wi l be 'moved spirall and inwardly about the post or sleeve, an because of the articulated swiveled connections between the sect-ions 4 and3 and 3 and 2, the section 3 will be withdrawn from the tire and moved spirali and the section 2 will be withdrawn from t e tire andmoved about its pivot 10', and this movement is continued until the parts assume the positie!) shown in Figs. 8 and 9, after which the can be stripped from the fixed section i Thearm22isangnlarlybmtaothataooneiderable freedom of movement is rovided before the arm comes in contact wi the tubular actuating device 25, thus to a considerable extent the inward movement of the section 4 before the section 3 is moved inwardly, andwhen in contact with the tubular actuating device, as shown in Fig. 6, the leverage or power 1s greatly increased and thus the withdrawal of the sections 8 and 9 by the power applied to section 4, ia f cilitated because in thi position v ar actuating device forms a fulernm about which the bent link 22 ia moved.

Itisto be noted that when in polll sition the sections 3 and 4 areelevated above. 'i i the plane of operative continuity so that the m section2canbemovedtoamanmnmextent Y in withdrawing'it from the tire.

Inoperatiomassumingthepartetobainn;

the. position of operative continuity and the plane of operative continuity, as shown inA It is to' bei-further.; noted that` the pivotal F wheelv 26 the movable parte are withdrawn 1 therefrom'and the core colla by the inward'and spiral movement o sections 8 and lll d, and the inward movement oi section 2, so that the tire then supported on section 1 can be readily removed therefrom.

ll claim: i

l. ln a collapsible core, a plurality of movable sections, swiveled articulations connectingr the said sections, and means swiveled to one oit said sections operable to move the said sections into and out of a position of. operative continuity successively and in a spiral direction about the axis of the core.

2. In a collapsible core, a plurality of movable sections, a tired section, and means to inove the movable sections successively into and out ot the position of operative conti nuity, one of said sections being pivoted with reference to the fixed 'section and having a movement in the plane of operative continuity only, and one of said sections being swiveled vvith reference to said pivoted section and having' a movement in a spiral line into and out ot the plane of operative continuity.

8. lin a collapsible core, a plurality of movable sections, one of said sections being pivotally mounted tor movement into and out of the position ot operative continuity, and the other sections pivotally connected for movenient into and out of the position of operative continuity, and also with relation to the plane ot operative continuity, an actuating device centrally disposed with relation to the core, and means connecting said actuating device to the tree end of one of the movable sections whereby to impart movement to said sections successively and in train.

d., In a collapsible core, a fixed section, a support therefor, a section pivoted to such support, and a plurality of sections pivotally connected to the pivoted section and to each other for a pivotal motion in tvvo directions, a centrally disposed actuating device rotatably mounted, means to impart thereto an ax-v ial movement, a link pivotally connected to the actuating device to move therewith and a swiveled connection between the said link and the free end of one of the movable sections.

5. In a collapsible core, a centrally disposed post, an actuating device mounted on the said post for rotary movement thereon and an axial movement along the said post, a train of segmental core sections havinof a svvivele'd connection with each other an a svviveled connection with the actuating device, and means whereby a revolution of the actuating device will move the sections successively and in a spiral direction into and out of the position of operative continuity and with relation to the plane of operative continuity.

6. In a collapsible core, a fixed section, a plurality of movable sections, one of which is pivoted with reference to the iiXed section, swiveled articulations connecting the said Vmovable sections, an actuator mounted so as to be capable of rotation relative to the core, and means responsive to the relative rotation of said core and actuator, for successively moving said swiveled articulated sections into and out of the position of operative continuity and into and out of the core plane, said movable sections, when moved out of the position of operative continuity being spirally disposed with respect to the actuator.

PETER DE MATTIA. 

